患者,男,20岁。因颈部右侧肿物渐进性肿大3年而就诊。查体:于颈部右侧胸锁乳突肌中段触及一6.0cm×4.0cm大小肿块,无压痛,表面光滑,边界清,质中,不随吞咽而移动,余未发现异常。血常规检查未见异常。B超检查:甲状腺右叶大小约为4.8cm× Patient, male, 20 years old. The patient was treated with a progressive swelling of the right side of the neck for 3 years. Physical examination: On the right side of the neck of the sternocleidomastoid muscle, a mass of 6.0 cm x 4.0 cm was touched. No tenderness, smooth surface, clear borders, and no movement with the swallow, no abnormalities were found. No abnormal blood tests. B-ultrasonic examination: the size of the right thyroid gland is approximately 4.8cm ×